Verdrag betreffende de nachtarbeid van jeudige personen in d Art. 4
PART I General Provisions
1 In countries where the climate renders work by day particularly trying, the night period and barred interval may be shorter than that prescribed in the above Articles if compensatory rest is accorded during the day.
2 The provisions of Articles 2 and 3 shall not apply to the night work of young persons between the ages of sixteen and eighteen years in case of emergencies which could not have been controlled or foreseen, which are not of a periodical character, and which interfere with the normal working of the industrial undertaking.